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Segment and Geographic Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Entity Wide Revenue Major Customer [Line Items]
Total revenues	$ 5,163.0	$ 5,369.4	$ 5,353.9	$ 5,138.9	$ 5,340.2	$ 5,754.6	$ 6,049.7	$ 5,675.9	$ 21,025.2	$ 22,820.4	$ 24,621.9
Total operating income	1,999.5	$ 2,417.7	$ 2,262.3	$ 2,143.1	2,144.2	$ 3,079.4	$ 2,295.1	$ 2,034.0	8,822.6	9,552.7	7,744.5
Total assets	32,811.2				33,803.7				32,811.2	33,803.7	31,023.9
Total capital expenditures									2,741.7	1,853.7	1,821.1
Depreciation and amortization									1,482.0	1,363.4	1,516.5
U.S.
Entity Wide Revenue Major Customer [Line Items]
Total revenues									7,665.8	8,006.4	8,252.7
Total operating income									4,015.6	4,022.4	3,768.7
Total assets	14,483.8				12,648.6				14,483.8	12,648.6	11,960.6
Total capital expenditures									1,849.8	861.2	586.7
Depreciation and amortization									598.4	524.1	510.3
International Lead Markets [Member]
Entity Wide Revenue Major Customer [Line Items]
Total revenues									7,600.1	7,340.3	7,223.4
Total operating income									3,485.7	3,166.5	2,838.4
Total assets	12,713.0				11,844.3				12,713.0	11,844.3	9,112.5
Total capital expenditures									436.4	515.3	635.6
Depreciation and amortization									472.9	461.1	451.6
High-Growth Markets [Member]
Entity Wide Revenue Major Customer [Line Items]
Total revenues									3,988.7	5,533.2	6,160.7
Total operating income									1,001.2	2,001.4	1,048.8
Total assets	4,404.9				4,480.7				4,404.9	4,480.7	5,208.6
Total capital expenditures									285.6	378.5	493.2
Depreciation and amortization									233.0	231.7	362.0
Foundational Markets and Corporate [Member]
Entity Wide Revenue Major Customer [Line Items]
Total revenues									1,770.6	1,940.5	2,985.1
Total operating income									320.1	362.4	88.6
Total assets	$ 1,209.5				$ 4,830.1				1,209.5	4,830.1	4,742.2
Total capital expenditures									169.9	98.7	105.6
Depreciation and amortization									$ 177.7	$ 146.5	$ 192.6

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