Consolidating Guarantor Financial Information (Schedule of Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 1,128	$ 1,195
Investing Activities
Capital expenditures on property, plant and equipment	(226)	(244)
Acquisitions, net of cash acquired	(91)	(144)
Proceeds from sale of businesses and assets, net	1	13
Return of capital from subsidiary	0	0
Contributions to subsidiary		0
Intercompany loan receipts (disbursements)	0	0
Other, net	(9)	(34)
Net cash provided by (used in) investing activities	(325)	(409)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	127	(86)
Proceeds from short-term borrowings	110	44
Repayments of short-term borrowings	(85)	(62)
Proceeds from long-term debt	499	0
Repayments of long-term debt	(354)	(56)
Purchases of treasury stock, including related fees	(763)	(250)
Dividends to parent	0	0
Contributions from parent		0
Common stock dividends	(225)	(209)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	(7)	(14)
Other, net	(38)	(6)
Net cash provided by (used in) financing activities	(736)	(639)
Exchange rate effects on cash and cash equivalents	(9)	(20)
Net increase (decrease) in cash and cash equivalents	58	127
Cash and cash equivalents as of beginning of period	439	576
Cash and cash equivalents as of end of period	497	703
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	988	459
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	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	(763)	(250)
Dividends to parent	0	0
Contributions from parent		0
Common stock dividends	(225)	(209)
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	(988)	(459)
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
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(47)	567
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	0
Return of capital from subsidiary	0	0
Contributions to subsidiary		0
Intercompany loan receipts (disbursements)	0	(327)
Other, net	0	0
Net cash provided by (used in) investing activities	0	(327)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	165	(33)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	499	285
Repayments of long-term debt	(335)	(19)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(272)	(459)
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	47	(226)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	14
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	0	14
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,132	224
Investing Activities
Capital expenditures on property, plant and equipment	(137)	(163)
Acquisitions, net of cash acquired	(31)	(144)
Proceeds from sale of businesses and assets, net	6	0
Return of capital from subsidiary	7	225
Contributions to subsidiary		(16)
Intercompany loan receipts (disbursements)	(649)	(12)
Other, net	1	(7)
Net cash provided by (used in) investing activities	(803)	(117)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	4	11
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	327
Repayments of long-term debt	(1)	(13)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(251)	(611)
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	(272)	(291)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	57	(184)
Cash and cash equivalents as of beginning of period	30	230
Cash and cash equivalents as of end of period	87	46
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	616	1,015
Investing Activities
Capital expenditures on property, plant and equipment	(89)	(81)
Acquisitions, net of cash acquired	(60)	0
Proceeds from sale of businesses and assets, net	0	13
Return of capital from subsidiary	0	0
Contributions to subsidiary		0
Intercompany loan receipts (disbursements)	0	(285)
Other, net	(15)	(27)
Net cash provided by (used in) investing activities	(164)	(380)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(3)	(52)
Proceeds from short-term borrowings	720	44
Repayments of short-term borrowings	(85)	(62)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(18)	(24)
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)	(225)
(Distributions to) contributions from noncontrolling interests	(7)	(14)
Other, net	(4)	(1)
Net cash provided by (used in) financing activities	(442)	(318)
Exchange rate effects on cash and cash equivalents	(9)	(20)
Net increase (decrease) in cash and cash equivalents	1	297
Cash and cash equivalents as of beginning of period	409	346
Cash and cash equivalents as of end of period	410	643
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,561)	(1,070)
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	(5)	0
Return of capital from subsidiary	(7)	(225)
Contributions to subsidiary		16
Intercompany loan receipts (disbursements)	649	624
Other, net	5	0
Net cash provided by (used in) investing activities	642	415
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(39)	(12)
Proceeds from short-term borrowings	(610)	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	(612)
Repayments of long-term debt	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	1,561	1,070
Contributions from parent		(16)
Common stock dividends	0	0
Return of capital to parent	7	225
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	919	655
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