Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 26, 2021	Dec. 27, 2020	Sep. 27, 2020
ASSETS
Restricted cash	$ 94.9	$ 73.2	$ 71.2
Accounts receivable, allowance for doubtful accounts	30.4	28.1	23.7
Property, plant and equipment, accumulated depreciation	607.6	553.0	546.8
Other intangibles, accumulated amortization	$ 1,027.4	$ 964.6	$ 885.8
Shareholders' equity
Preference stock, par value (in dollars per share)	$ 2.50	$ 2.50	$ 2.50
Preference stock, authorized (in shares)	5,000,000	5,000,000	5,000,000
Preference stock, issued (in shares)	0	0	0
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50	$ 0.50
Common stock, authorized (in shares)	600,000,000	600,000,000	600,000,000
Common stock, issued (in shares)	220,286,736	220,286,736	220,286,736
Treasury stock (in shares)	82,359,425	82,979,403	83,256,622