Shareholders' equity (Share repurchase program textuals) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended
	Aug. 24, 2019	Sep. 28, 2019	Sep. 29, 2018
Shareholders' equity
Authorized repurchase of common stock under Share Repurchase Program	$ 500,000	$ 2,950,000
Shares repurchased during period (in shares)		2.6
Cost of repurchase		$ 112,100
Remaining authorized repurchase amount		$ 593,300
Cash dividends paid per common share	$ 0.21	$ 0.21	$ 0.20
Dividends paid on common stock		$ 21,451	$ 22,932