Debt and Lines of Credit (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Long-term debt outstanding is as follows:

	March 31,			December 31,
	2019			2018
Notes due 2019 at 1.65%	$	750		$	750
Notes due 2020 at 1.75%		500			500
Notes due 2021 at 2.75%		550			550
Notes due 2022 at 1.85%		500			500
Notes due 2023 at 2.25%		500			500
Notes due 2024 at 2.625%		300			300
Notes due 2027 at 2.90%		500			500
Notes due 2039 at 3.875%		750			—
Notes due 2048 at 4.15%		1,500			1,500
Total debt		5,850			5,100
Net unamortized discounts, premiums and issuance costs		(43	)		(32	)
Total debt, including net unamortized discounts, premiums and issuance costs		5,807			5,068
Current portion of long-term debt		(750	)		(749	)
Long-term debt	$	5,057		$	4,319