.875% ( 1.875 % ) $ 750 million senior notes due 2017 . the notes were redeemed for $ 1.9 billion , which included 100 percent of the principal amount and a make-whole premium of $ 40 million . on the date of redemption , these notes also had an unamortized discount of $ 2 million and unamortized debt issuance costs of $ 6 million