Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Repurchase Of Shares Of Common Stock

	Shares Repurchased (thousands)						Dollar Value of Shares Repurchased
Authorization Date	2020		2019		2018		2020			2019			2018
November 2019	2,419		—		—		$	250		$	—		$	—
August 2018	—		7,788		10,003		—			810			894
November 2017	—		—		18,240		—			—			1,500
Total	2,419	(a)	7,788	(b)	28,243	(b)	$	250	(a)	$	810	(b)	$	2,394	(b)

(a)    2020 amount includes the effect of $11 million in share repurchases (0.1 million shares) with trade dates on, or prior to, December 31, 2020, but settlement dates subsequent to December 31, 2020.

(b)    2019 amount excludes and 2018 amount includes the effect of $5 million in share repurchases (0.1 million shares) with trade dates on, or prior to, December 31, 2018, but settlement dates subsequent to December 31, 2018.

Schedule of changes in accumulated other comprehensive income

Changes in AOCI are presented below.

	Translation Adjustments and Gains (Losses) From Intra-Entity Transactions of a Long-Term Nature		Pension and Post-Retirement Benefits(a)		Derivative Instruments(b)		Total
Balance at December 31, 2018, net of tax	$	(245)	$	(82)	$	(7)	$	(334)
OCI, net of tax
Gains (losses) arising during the year classified into AOCI, net of tax	24		(30)		(35)		(41)
(Gains) losses reclassified from AOCI, net of tax	—		8		(21)		(13)
	24		(22)		(56)		(54)
Balance at December 31, 2019, net of tax	$	(221)	$	(104)	$	(63)	$	(388)
OCI, net of tax
Gains (losses) arising during the year classified into AOCI, net of tax	39		(6)		(75)		(42)
(Gains) losses reclassified from AOCI, net of tax	—		14		5		19
	39		8		(70)		(23)
Balance at December 31, 2020, net of tax	$	(182)	$	(96)	$	(133)	$	(411)

(a)    Amounts reclassified from AOCI for pension and post-retirement benefit plans losses during 2020 include amortization of net losses of $14 million, amortization of prior service cost of $4 million and related income tax benefit of $4 million. Amounts reclassified from AOCI for pension and post-retirement benefit plans losses during 2019 include amortization of net losses of $2 million, amortization of prior service cost of $5 million, settlement charges of $3 million and related income tax benefit of $2 million. See Note 15.

(b)    See Note 13 for details on amounts reclassified from AOCI.