Income Taxes (Narrative) (Details) $ in Thousands, € in Millions, DKK in Millions				3 Months Ended	12 Months Ended			36 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 10, 2013 DKK	Dec. 31, 2014 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 DKK	Dec. 31, 2012 USD ($)
Income tax provision					$ 725,300	$ 857,600	$ 825,700
Net deferred tax liabilities	$ 3,106,700	$ 1,835,100			3,106,700	$ 1,835,100
Valuation allowance, deferred tax asset, change in amount					$ 115,000
Effective income tax rate					21.80%	25.20%	24.20%
Statutory federal income tax rate					35.00%	35.00%	35.00%
Income tax payments					$ 584,000	$ 569,000	$ 529,000
Tax deductions attributable to stock-based compensation					147,000	82,000	80,000
Excess tax benefit from share-based compensation, financing activities					88,000	50,000	49,000
Deferred tax assets, valuation allowances	215,000	330,500			215,000	330,500
Gross unrecognized tax benefits	990,200	728,490			990,200	728,490	689,000		$ 613,200
Unrecognized tax benefits, net of offsetting indirect tax benefits		687,000				687,000
Unrecognized tax benefits, indirect tax benefits		172,000				172,000
Potential interest and penalties		131,000				131,000
Recognized potential interest and penalties					39,000	44,000	43,000
Unrecognized tax benefits, period increase (decrease)					900,000
Estimated reduction in unrecognized tax benefits within twelve months	125,000				125,000
Cash and equivalents	790,800	3,005,600			790,800	$ 3,005,600	$ 3,115,200		$ 1,678,700
Undistributed earnings of foreign subsidiaries	23,500,000				$ 23,500,000
Net discrete tax benefits basis points					(1.40%)	1.70%	(0.20%)
International
Cash and equivalents	755,000				$ 755,000
Entity | United States
Net deferred tax liabilities	2,700,000	1,800,000			2,700,000	$ 1,800,000
Entity | International
Net deferred tax liabilities	367,000	76,000			367,000	76,000
Foreign tax authority | Denmark, Kroner
Income tax examination, amount of tax assessments | DKK			DKK 1,200
Income tax examination, amount of potential additional tax assessments | DKK								DKK 700
Foreign tax authority | USD
Income tax examination, amount of tax assessments	180,000
Income tax examination, amount of potential additional tax assessments	102,000
Tax adjustments, settlements, and unusual provisions		60,000
Foreign tax authority | Euro
Tax adjustments, settlements, and unusual provisions | €				€ 49
Discontinued operations
Income tax provision					16,000	26,000	$ 45,000
Net deferred tax liabilities		$ 59,000				59,000
Continuing operations
Income tax provision					725,300	$ 857,600	$ 825,700
Net operating loss carryforwards	509,000				509,000
Operating loss carryforwards, valuation allowances	172,000				172,000
Gross unrecognized tax benefits	990,000				990,000
Unrecognized tax benefits, net of offsetting indirect tax benefits	905,000				905,000
Unrecognized tax benefits, indirect tax benefits	233,000				233,000
Potential interest and penalties	148,000				148,000
Continuing operations | General business and foreign tax credit
Tax credit carryforwards	369,000				369,000
Tax credit carryforward, valuation allowance	25,000				25,000
Deferred tax asset, other | Continuing operations
Deferred tax assets, valuation allowances	$ 18,000				$ 18,000