Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Measurements

Fair Value, Assets and Liabilities Measured on Recurring Basis

			Fair Value Measurements
Description	Fair Value at		Using Inputs Considered as
(Millions)	December 31, 2016		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
Corporate debt securities	$	10	$	—	$	10	$	—
Commercial paper		14		—		14		—
Certificates of deposit/time deposits		197		—		197		—
Asset-backed securities:
Automobile loan related		31		—		31		—
Credit card related		18		—		18		—
Other		7		—		7		—
U.S. municipal securities		20		—		—		20
Derivative instruments — assets:
Foreign currency forward/option contracts		234		—		234		—
Interest rate swap contracts		25		—		25		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		94		—		94		—
Interest rate swap contracts		1		—		1		—

			Fair Value Measurements
Description	Fair Value at		Using Inputs Considered as
(Millions)	December 31, 2015		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
Corporate debt securities	$	10	$	—	$	10	$	—
Foreign government agency securities		10		—		10		—
Commercial paper		12		—		12		—
Certificates of deposit/time deposits		26		—		26		—
Asset-backed securities:
Automobile loan related		26		—		26		—
Credit card related		10		—		10		—
Other		21		—		21		—
U.S. municipal securities		12		—		—		12
Derivative instruments — assets:
Foreign currency forward/option contracts		272		—		272		—
Interest rate swap contracts		24		—		24		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		68		—		68		—
Interest rate swap contracts		1		—		1		—

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

Marketable securities — certain U.S. municipal securities and auction rate securities only
(Millions)	2016		2015		2014
Beginning balance	$	12	$	15	$	11
Total gains or losses:
Included in earnings		—		—		(1)
Included in other comprehensive income		—		—		2
Purchases and issuances		12		—		15
Sales and settlements		(4)		(3)		(12)
Transfers in and/or out of level 3		—		—		—
Ending balance		20		12		15
Change in unrealized gains or losses for the period included in earnings for securities held at the end of the reporting period		—		—		—

Fair Value of Financial Instruments by Balance Sheet Grouping

	December 31, 2016				December 31, 2015
	Carrying		Fair		Carrying		Fair
(Millions)	Value		Value		Value		Value
Long-term debt, excluding current portion	$	10,678	$	11,168	$	8,753	$	9,101