Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019
Statement of Cash Flows [Abstract]
Net earnings	$ 119,275	$ 253,109
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of plant and equipment	94,100	101,016
Amortization of intangibles	107,685	35,445
Asset impairments	40,878	0
Program cost amortization	268,245	58,105
Deferred income taxes	12,549	(27,974)
Stock-based compensation	40,015	24,787
Non-cash pension settlement	0	110,777
Other non-cash items	(1,646)	13,347
Change in operating assets and liabilities net of acquired balances:
Decrease (increase) in accounts receivable	165,593	(236,010)
Increase in inventories	(96,907)	(154,476)
(Increase) decrease in prepaid expenses and other current assets	(10,007)	2,440
Program spend, net	(294,597)	(43,857)
Increase in accounts payable and accrued liabilities	18,980	236,777
Change in net deemed repatriation tax	(18,364)	(14,550)
Other	48,511	30,632
Net cash provided by operating activities	494,310	389,568
Cash flows from investing activities:
Additions to property, plant and equipment	(92,059)	(90,800)
Acquisitions, net of cash acquired	(4,403,929)	0
Other	24,297	4,340
Net cash utilized by investing activities	(4,471,691)	(86,460)
Cash flows from financing activities:
Proceeds from borrowings with maturity greater than three months	1,036,037	0
Repayments of borrowings with maturity greater than three months	(147,324)	0
Net proceeds from other short-term borrowings	(319)
Net proceeds from other short-term borrowings		(1,425)
Purchases of common stock	0	(60,137)
Stock-based compensation transactions	1,830	29,737
Dividends paid	(279,423)	(250,760)
Payments related to tax withholding for share-based compensation	(5,935)	(13,061)
Redemption of equity instruments	(47,399)	0
Deferred acquisition payments	0	(100,000)
Debt acquisition costs	0	(21,534)
Other	(6,949)	0
Net cash provided (utilized) by financing activities	550,518	(417,180)
Effect of exchange rate changes on cash	(21,101)	(7,867)
Decrease in cash, cash equivalents and restricted cash	(3,447,964)	(121,939)
Cash, cash equivalents and restricted cash at beginning of year	4,580,369	1,182,371
Cash, cash equivalents and restricted cash at end of period	1,132,405	1,060,432
Cash paid during the period for:
Interest	123,595	69,601
Income taxes	$ 66,008	$ 64,917