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Debt and Credit Facilities (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Summary of financing arrangements
The following table summarizes the carrying amount of our borrowings under various financing arrangements:
(in millions)December 31,
Type of BorrowingIssue DateDue DateInterest Rate20202019
Senior UnsecuredNovember 2014February 20202.35%$— $500 
Senior UnsecuredSeptember 2015September 20202.55%— 1,999 
Senior UnsecuredMarch 2011April 20214.50%1,000 998 
Senior UnsecuredSeptember 2020September 2021
3-month LIBOR + 0.15%
499 — 
Senior UnsecuredDecember 2011December 20214.40%1,249 1,248 
Senior UnsecuredSeptember 2016March 20221.95%499 499 
Senior UnsecuredSeptember 2015September 20223.25%998 998 
Senior UnsecuredSeptember 2016September 20232.50%748 747 
Senior UnsecuredSeptember 2020September 2023
3-month LIBOR + 0.52%
498 — 
Senior UnsecuredSeptember 2020September 20230.75%1,992 — 
Term LoanOctober 2020October 2023variable998 — 
Senior UnsecuredMarch 2014April 20243.70%1,746 1,745 
Senior UnsecuredNovember 2014February 20253.50%1,746 1,746 
Senior UnsecuredSeptember 2015March 20263.65%2,737 2,734 
Senior UnsecuredSeptember 2016March 20272.95%1,246 1,245 
Senior UnsecuredSeptember 2020October 20271.20%745 — 
Senior UnsecuredSeptember 2020October 20301.65%992 — 
Senior UnsecuredSeptember 2015September 20354.60%991 991 
Senior UnsecuredSeptember 2016September 20364.00%741 741 
Senior UnsecuredSeptember 2020October 20402.60%986 — 
Senior UnsecuredDecember 2011December 20415.65%996 995 
Senior UnsecuredMarch 2014April 20444.80%1,735 1,734 
Senior UnsecuredNovember 2014February 20454.50%1,732 1,731 
Senior UnsecuredSeptember 2015March 20464.75%2,219 2,217 
Senior UnsecuredSeptember 2016March 20474.15%1,726 1,725 
Senior UnsecuredSeptember 2020October 20502.80%1,476 — 
Total senior unsecured notes and term loan facility30,295 24,593 
Liability related to future royalties1,107 — 
Total debt, net31,402 24,593 
Less: current portion of long-term debt and other obligations, net
2,757 2,499 
Total long-term debt, net$28,645 $22,094 
Schedule of contractual maturities of financing obligations
The following table summarizes the aggregate future principal maturities of our senior unsecured notes and Term Loan Facility as of December 31, 2020:
(in millions)Amount
2021$2,750 
20221,500 
20234,250 
20241,750 
20251,750 
Thereafter18,500 
Total$30,500