Benefit Plans - Pension Assets by Percentage (Details) - Pension Benefits	Dec. 31, 2022	Dec. 25, 2021
Asset category
Total plan assets (as a percent)	100.00%	100.00%
Equity securities (includes equity mutual funds)
Asset category
Total plan assets (as a percent)	67.00%	66.00%
Multi-asset securities
Asset category
Total plan assets (as a percent)	22.00%	24.00%
Cash and equivalents (includes money market funds)
Asset category
Total plan assets (as a percent)	1.00%	0.00%
Alternative investments
Asset category
Total plan assets (as a percent)	10.00%	10.00%