Borrowing and Credit Agreements (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Summary of the Company's borrowings

The following table is a summary of the Company’s borrowings as of December 31: 

In millions	2016			2015
Short-term debt
Commercial paper	$	1,874		$	—
Long-term debt
1.2% senior notes due 2016	—			750
6.125% senior notes due 2016	—			421
5.75% senior notes due 2017	—			1,080
1.9% senior notes due 2018	2,250			2,250
2.25% senior notes due 2018	1,250			1,250
2.25% senior notes due 2019	850			850
6.6% senior notes due 2019	—			394
2.8% senior notes due 2020	2,750			2,750
4.75% senior notes due 2020	—			450
2.125% senior notes due 2021	1,750			—
4.125% senior notes due 2021	550			550
2.75% senior notes due 2022	1,250			1,250
3.5% senior notes due 2022	1,500			1,500
4.75% senior notes due 2022	399			400
4% senior notes due 2023	1,250			1,250
3.375% senior notes due 2024	650			650
5% senior notes due 2024	299			300
3.875% senior notes due 2025	2,828			3,000
2.875% senior notes due 2026	1,750			—
6.25% senior notes due 2027	372			453
3.25% senior exchange debentures due 2035	1			5
4.875% senior notes due 2035	652			2,000
6.125% senior notes due 2039	447			734
5.75% senior notes due 2041	133			493
5.3% senior notes due 2043	750			750
5.125% senior notes due 2045	3,500			3,500
Capital lease obligations	648			644
Other	23			20
Total debt principal	27,726			27,694
Debt premiums	33			39
Debt discounts and deferred financing costs	(228		)	(269		)
	27,531			27,464
Less:
Short-term debt (commercial paper)	(1,874		)	—
Current portion of long-term debt	(42		)	(1,197		)
Long-term debt	$	25,615		$	26,267

Schedule of Maturities of Long-term Debt

The following is a summary of the Company's required principal debt repayments, excluding unamortized debt discounts, deferred financing costs and debt premiums, due during each of the next five years and thereafter, as of December 31, 2016:

In millions
2017	$	1,916
2018	3,521
2019	872
2020	2,774
2021	2,326
Thereafter	16,317
Total	$	27,726