v3.26.1
Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical)
Jun. 30, 2025
shares
Statement of Stockholders' Equity [Abstract]
Shares repurchased not yet settled
185,042
X
- Definition
Stock Repurchased During Period, Shares, Not Yet Settled
+ References
No definition available.
+ Details
Name:
gpk_StockRepurchasedDuringPeriodSharesNotYetSettled
Namespace Prefix:
gpk_
Data Type:
xbrli:sharesItemType
Balance Type:
na
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration