Consolidating Guarantor Financial Information (Schedule of Consolidating Cash Flow Statements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 1,454	$ 1,558	$ 803
Investing Activities
Capital expenditures on property, plant and equipment	(370)	(337)	(267)
Acquisitions, net of cash acquired	(91)	(144)	(269)
Proceeds from sale of businesses and assets, net	1	13	1
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0	0
Purchases of marketable securities	(16)	0	0
Other, net	(17)	(39)	(14)
Net cash provided by (used in) investing activities	(493)	(507)	(549)
Financing Activities
Short-term borrowings (repayments), net	247	(38)	111
Proceeds from short-term borrowings	117	51	182
Repayments of short-term borrowings	(91)	(78)	(124)
Proceeds from long-term debt	499	561	351
Repayments of long-term debt	(360)	(536)	(77)
Purchases of treasury stock, including related fees	(996)	(805)	(500)
Dividends to parent	0	0	0
Contributions from parent	0	0
Stock option exercises	(1)	0	1
Common stock dividends	(300)	(280)	(241)
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	(10)	(23)	(27)
Other, net	(40)	(17)	(27)
Net cash provided by (used in) financing activities	(935)	(1,165)	(351)
Exchange rate effects on cash and cash equivalents	(2)	(23)	35
Net increase (decrease) in cash and cash equivalents	24	(137)	(62)
Cash and cash equivalents as of beginning of period	439	576	638
Cash and cash equivalents as of end of period	463	439	576
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,297	1,085	740
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	0	0
Proceeds from sale of businesses and assets, net	0	0	0
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0	0
Purchases of marketable securities	0
Other, net	0	0	0
Net cash provided by (used in) investing activities	0	0	0
Financing Activities
Short-term borrowings (repayments), net	0	0	0
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	0	0	0
Repayments of long-term debt	0	0	0
Purchases of treasury stock, including related fees	(996)	(805)	(500)
Dividends to parent	0	0	0
Contributions from parent	0	0
Stock option exercises	(1)		1
Common stock dividends	(300)	(280)	(241)
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	0	0	0
Net cash provided by (used in) financing activities	(1,297)	(1,085)	(740)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents as of beginning of period	0	0	0
Cash and cash equivalents as of end of period	0	0	0
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(42)	560	868
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	0	(11)
Proceeds from sale of businesses and assets, net	0	0	0
Return of capital from subsidiary	0	0	16
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	(427)	(530)
Purchases of marketable securities	0
Other, net	0	0	0
Net cash provided by (used in) investing activities	0	(427)	(525)
Financing Activities
Short-term borrowings (repayments), net	160	61	56
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	499	846	351
Repayments of long-term debt	(335)	(494)	(6)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	272	541	741
Contributions from parent	0	0
Stock option exercises	0		0
Common stock dividends	0	0	0
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	(10)	(5)	(3)
Net cash provided by (used in) financing activities	42	(133)	(343)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents as of beginning of period	0	0	0
Cash and cash equivalents as of end of period	0	0	0
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,044	259	425
Investing Activities
Capital expenditures on property, plant and equipment	(246)	(225)	(176)
Acquisitions, net of cash acquired	(31)	(144)	(12)
Proceeds from sale of businesses and assets, net	9	0	9
Return of capital from subsidiary	10	233	241
Contributions to subsidiary	(222)	(25)
Intercompany loan receipts (disbursements)	(536)	(66)	(25)
Purchases of marketable securities	0
Other, net	0	(8)	(2)
Net cash provided by (used in) investing activities	(1,016)	(235)	35
Financing Activities
Short-term borrowings (repayments), net	17	18	15
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	0	427	530
Repayments of long-term debt	(1)	(26)	(2)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	251	633	802
Contributions from parent	218	0
Stock option exercises	0		0
Common stock dividends	0	0	0
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	(25)	(10)	(22)
Net cash provided by (used in) financing activities	(42)	(224)	(281)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	(14)	(200)	179
Cash and cash equivalents as of beginning of period	30	230	51
Cash and cash equivalents as of end of period	16	30	230
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	716	833	593
Investing Activities
Capital expenditures on property, plant and equipment	(124)	(112)	(91)
Acquisitions, net of cash acquired	(60)	0	(274)
Proceeds from sale of businesses and assets, net	0	13	20
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	(218)	0
Intercompany loan receipts (disbursements)	0	(285)	0
Purchases of marketable securities	(16)
Other, net	(25)	(31)	(12)
Net cash provided by (used in) investing activities	(443)	(415)	(357)
Financing Activities
Short-term borrowings (repayments), net	(4)	(51)	51
Proceeds from short-term borrowings	727	51	182
Repayments of short-term borrowings	(91)	(78)	(124)
Proceeds from long-term debt	0	0	14
Repayments of long-term debt	(24)	(16)	(69)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	1,038	5	280
Contributions from parent	222	25
Stock option exercises	0		0
Common stock dividends	0	0	0
Return of capital to parent	(10)	(233)	(257)
(Distributions to) contributions from noncontrolling interests	(10)	(23)	(27)
Other, net	(5)	(2)	(2)
Net cash provided by (used in) financing activities	(233)	(332)	(512)
Exchange rate effects on cash and cash equivalents	(2)	(23)	35
Net increase (decrease) in cash and cash equivalents	38	63	(241)
Cash and cash equivalents as of beginning of period	409	346	587
Cash and cash equivalents as of end of period	447	409	346
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,561)	(1,179)	(1,823)
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	0	28
Proceeds from sale of businesses and assets, net	(8)	0	(28)
Return of capital from subsidiary	(10)	(233)	(257)
Contributions to subsidiary	440	25
Intercompany loan receipts (disbursements)	536	778	555
Purchases of marketable securities	0
Other, net	8	0	0
Net cash provided by (used in) investing activities	966	570	298
Financing Activities
Short-term borrowings (repayments), net	74	(66)	(11)
Proceeds from short-term borrowings	(610)	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	0	(712)	(544)
Repayments of long-term debt	0	0	0
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	(1,561)	(1,179)	(1,823)
Contributions from parent	(440)	(25)
Stock option exercises	0		0
Common stock dividends	0	0	0
Return of capital to parent	10	233	257
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	0	0	0
Net cash provided by (used in) financing activities	595	609	1,525
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents as of beginning of period	0	0	0
Cash and cash equivalents as of end of period	$ 0	$ 0	$ 0