Consolidating Guarantor Financial Information (Schedule of Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 731	$ 728
Investing Activities
Capital expenditures on property, plant and equipment	(144)	(165)
Acquisitions, net of cash acquired	(91)	(144)
Proceeds from sale of businesses and assets, net	0	9
Return of capital from subsidiary	0	0
Contributions to subsidiary		0
Intercompany loan receipts (disbursements)	0	0
Other, net	(8)	(31)
Net cash provided by (used in) investing activities	(243)	(331)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	105	40
Proceeds from short-term borrowings	0	36
Repayments of short-term borrowings	(12)	(39)
Proceeds from long-term debt	499	0
Repayments of long-term debt	(348)	(43)
Purchases of treasury stock, including related fees	(488)	(100)
Dividends to parent	0	0
Contributions from parent		0
Proceeds from Stock Options Exercised	0	0
Common stock dividends	(148)	(136)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	(7)	(8)
Other, net	(38)	(6)
Net cash provided by (used in) financing activities	(437)	(256)
Exchange rate effects on cash and cash equivalents	1	(9)
Net increase (decrease) in cash and cash equivalents	52	132
Cash and cash equivalents as of beginning of period	439	576
Cash and cash equivalents as of end of period	491	708
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	636	238
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net		0
Return of capital from subsidiary	0	0
Contributions to subsidiary		0
Intercompany loan receipts (disbursements)	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	0	0
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	0	0
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	0
Repayments of long-term debt	0	0
Purchases of treasury stock, including related fees	(488)	(100)
Dividends to parent	0	0
Contributions from parent		0
Common stock dividends	(148)	(136)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	(636)	(236)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	2
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	0	2
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(31)	432
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net		0
Return of capital from subsidiary	0	0
Contributions to subsidiary		0
Intercompany loan receipts (disbursements)	0	(272)
Other, net	0	0
Net cash provided by (used in) investing activities	0	(272)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	149	90
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	499	0
Repayments of long-term debt	(335)	(12)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(272)	(238)
Contributions from parent		0
Common stock dividends	0	0
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	(10)	0
Net cash provided by (used in) financing activities	31	(160)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	0	0
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,052	115
Investing Activities
Capital expenditures on property, plant and equipment	(83)	(109)
Acquisitions, net of cash acquired	(31)	(144)
Proceeds from sale of businesses and assets, net		0
Return of capital from subsidiary	7	218
Contributions to subsidiary		(16)
Intercompany loan receipts (disbursements)	(653)	(10)
Other, net	2	(7)
Net cash provided by (used in) investing activities	(758)	(68)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	3	11
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	272
Repayments of long-term debt	(1)	(13)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(251)	(449)
Contributions from parent		0
Common stock dividends	0	0
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	(24)	(5)
Net cash provided by (used in) financing activities	(273)	(184)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	21	(137)
Cash and cash equivalents as of beginning of period	30	230
Cash and cash equivalents as of end of period	51	93
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	635	630
Investing Activities
Capital expenditures on property, plant and equipment	(61)	(56)
Acquisitions, net of cash acquired	(60)	0
Proceeds from sale of businesses and assets, net		9
Return of capital from subsidiary	0	0
Contributions to subsidiary		0
Intercompany loan receipts (disbursements)	0	0
Other, net	(10)	(24)
Net cash provided by (used in) investing activities	(131)	(71)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(4)	(51)
Proceeds from short-term borrowings	610	36
Repayments of short-term borrowings	(12)	(39)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(12)	(18)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(1,038)	0
Contributions from parent		16
Common stock dividends	0	0
Return of capital to parent	(7)	(218)
(Distributions to) contributions from noncontrolling interests	(7)	(8)
Other, net	(4)	(1)
Net cash provided by (used in) financing activities	(474)	(283)
Exchange rate effects on cash and cash equivalents	1	(9)
Net increase (decrease) in cash and cash equivalents	31	267
Cash and cash equivalents as of beginning of period	409	346
Cash and cash equivalents as of end of period	440	613
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,561)	(687)
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net		0
Return of capital from subsidiary	(7)	(218)
Contributions to subsidiary		16
Intercompany loan receipts (disbursements)	653	282
Other, net	0	0
Net cash provided by (used in) investing activities	646	80
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(43)	(10)
Proceeds from short-term borrowings	(610)	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	(272)
Repayments of long-term debt	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	1,561	687
Contributions from parent		(16)
Common stock dividends	0	0
Return of capital to parent	7	218
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	915	607
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	$ 0	$ 0