Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Statement of Cash Flows [Abstract]
Net earnings (loss)	$ (67,810)	$ 26,727
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation of plant and equipment	23,666	27,028
Amortization of intangibles	36,811	11,816
Asset impairments	40,878	0
Program cost amortization	132,146	6,575
Deferred income taxes	(3,127)	11,795
Stock-based compensation	10,651	5,285
Other non-cash items	8,418	(3,503)
Change in operating assets and liabilities net of acquired balances:
Decrease in accounts receivable	653,687	558,888
Increase in inventories	(13,933)	(50,109)
Increase in prepaid expenses and other current assets	(22,965)	(33,934)
Program production costs, net	(168,043)	(17,728)
Decrease in accounts payable and accrued liabilities	(315,781)	(273,955)
Other	(22,971)	(4,391)
Net cash provided by operating activities	291,627	264,494
Cash flows from investing activities:
Additions to property, plant and equipment	(30,833)	(25,201)
Acquisitions, net of cash acquired	(4,403,929)	0
Other	4,271	(1,800)
Net cash utilized by investing activities	(4,430,491)	(27,001)
Cash flows from financing activities:
Proceeds from borrowings with maturity greater than three months	1,017,689	0
Repayments of borrowings with maturity greater than three months	(50,186)	0
Net repayments of other short-term borrowings	(1,424)
Net repayments of other short-term borrowings		3,419
Purchases of common stock	0	(47,479)
Stock-based compensation transactions	1,830	2,335
Dividends paid	(93,162)	(79,274)
Payments related to tax withholding for share-based compensation	(5,307)	(11,880)
Redemption of equity instruments	(47,399)	0
Deferred acquisition payments	0	(87,500)
Other	(2,572)	0
Net cash provided (utilized) by financing activities	819,469	(220,379)
Effect of exchange rate changes on cash	(23,090)	(2,851)
(Decrease) increase in cash, cash equivalents and restricted cash	(3,342,485)	14,263
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	1,237,884	1,196,634
Cash paid during the period for:
Interest	13,479	28,576
Income taxes	$ 19,915	$ 13,019