Consolidating Guarantor Financial Information (Schedule of Consolidating Cash Flow Statements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 1,558	$ 803	$ 893
Investing Activities
Capital expenditures on property, plant and equipment	(337)	(267)	(246)
Acquisitions, net of cash acquired	(144)	(269)	(178)
Proceeds from sale of businesses and assets, net	13	1	12
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	0	0	0
Other, net	(39)	(14)	(27)
Net cash provided by (used in) investing activities	(507)	(549)	(439)
Financing Activities
Short-term borrowings (repayments), net	(38)	111	(352)
Proceeds from short-term borrowings	51	182	53
Repayments of short-term borrowings	(78)	(124)	(90)
Proceeds from long-term debt	561	351	1,509
Repayments of long-term debt	(536)	(77)	(1,127)
Purchases of treasury stock, including related fees	(805)	(500)	(500)
Dividends to parent	0	0	0
Contributions from parent	0	0	0
Stock option exercises	0	1	6
Common stock dividends	(280)	(241)	(201)
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	(23)	(27)	(24)
Other, net	(17)	(27)	(33)
Net cash provided by (used in) financing activities	(1,165)	(351)	(759)
Exchange rate effects on cash and cash equivalents	(23)	35	(24)
Net increase (decrease) in cash and cash equivalents	(137)	(62)	(329)
Cash and cash equivalents as of beginning of period	576	638	967
Cash and cash equivalents as of end of period	439	576	638
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,085	740	695
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	0
Intercompany loan receipts (disbursements)	0	0	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	(805)	(500)	(500)
Dividends to parent	0	0	0
Contributions from parent	0	0	0
Stock option exercises	0	1	6
Common stock dividends	(280)	(241)	(201)
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	(1,085)	(740)	(695)
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	560	868	711
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	(11)	0
Proceeds from sale of businesses and assets, net	0	0	0
Return of capital from subsidiary	0	16	145
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	(427)	(530)	(283)
Other, net	0	0	0
Net cash provided by (used in) investing activities	(427)	(525)	(138)
Financing Activities
Short-term borrowings (repayments), net	61	56	(371)
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	846	351	1,589
Repayments of long-term debt	(494)	(6)	(1,083)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	541	741	695
Contributions from parent	0	0	0
Stock option exercises	0	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	(5)	(3)	(13)
Net cash provided by (used in) financing activities	(133)	(343)	(573)
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	259	425	(21)
Investing Activities
Capital expenditures on property, plant and equipment	(225)	(176)	(139)
Acquisitions, net of cash acquired	(144)	(12)	0
Proceeds from sale of businesses and assets, net	0	9	1
Return of capital from subsidiary	233	241	758
Contributions to subsidiary	(25)	0	0
Intercompany loan receipts (disbursements)	(66)	(25)	19
Other, net	(8)	(2)	(10)
Net cash provided by (used in) investing activities	(235)	35	629
Financing Activities
Short-term borrowings (repayments), net	18	15	1
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	427	530	746
Repayments of long-term debt	(26)	(2)	(635)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	633	802	669
Contributions from parent	0	0	0
Stock option exercises	0	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)	(22)	(21)
Net cash provided by (used in) financing activities	(224)	(281)	(578)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	(200)	179	30
Cash and cash equivalents as of beginning of period	230	51	21
Cash and cash equivalents as of end of period	30	230	51
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	833	593	872
Investing Activities
Capital expenditures on property, plant and equipment	(112)	(91)	(107)
Acquisitions, net of cash acquired	0	(274)	(178)
Proceeds from sale of businesses and assets, net	13	20	11
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	(285)	0	90
Other, net	(31)	(12)	(17)
Net cash provided by (used in) investing activities	(415)	(357)	(201)
Financing Activities
Short-term borrowings (repayments), net	(51)	51	(1)
Proceeds from short-term borrowings	51	182	53
Repayments of short-term borrowings	(78)	(124)	(90)
Proceeds from long-term debt	0	14	0
Repayments of long-term debt	(16)	(69)	(42)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	5	280	0
Contributions from parent	25	0	0
Stock option exercises	0	0	0
Common stock dividends	0	0	0
Return of capital to parent	(233)	(257)	(903)
(Distributions to) contributions from noncontrolling interests	(23)	(27)	(24)
Other, net	(2)	(2)	1
Net cash provided by (used in) financing activities	(332)	(512)	(1,006)
Exchange rate effects on cash and cash equivalents	(23)	35	(24)
Net increase (decrease) in cash and cash equivalents	63	(241)	(359)
Cash and cash equivalents as of beginning of period	346	587	946
Cash and cash equivalents as of end of period	409	346	587
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,179)	(1,823)	(1,364)
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	28	0
Proceeds from sale of businesses and assets, net	0	(28)	0
Return of capital from subsidiary	(233)	(257)	(903)
Contributions to subsidiary	25	0	0
Intercompany loan receipts (disbursements)	778	555	174
Other, net	0	0	0
Net cash provided by (used in) investing activities	570	298	(729)
Financing Activities
Short-term borrowings (repayments), net	(66)	(11)	19
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	(712)	(544)	(826)
Repayments of long-term debt	0	0	633
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	(1,179)	(1,823)	(1,364)
Contributions from parent	(25)	0	0
Stock option exercises	0	0	0
Common stock dividends	0	0	0
Return of capital to parent	233	257	903
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	0	0	0
Net cash provided by (used in) financing activities	609	1,525	2,093
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